Marzio Martelli has found clay courts difficult, recording 12–22 across 34 matches (35.3%). The numbers point to a surface that has not consistently suited the game — a key area of opportunity on the calendar.

At Grand Slam level (Roland Garros): 1–1 across just 2 matches — still very early days at this level on clay.

ATP Masters 1000 on clay (Monte Carlo, Madrid, Rome): Marzio Martelli has struggled at Masters level on clay: 0–4 (0.0%) in 4 matches. Improving at this level is the clearest path to a stronger overall record on this surface.

2 semifinals on clay without yet reaching a final — consistent deep runs that show the ability to string together wins across a full draw, with the step to the final still to come. 3 quarterfinals adds further depth to that picture.

vs. Top 10 on clay: 0–3 (0.0%, 3 matches). Top 10 opponents have represented a clear ceiling on clay; addressing that deficit is the single biggest lever for improving the overall record here.

Best season: 1996 — 3–2 (60.0%) from 5 matches. The best single-season display to date — a useful reference point as the clay record continues to develop.